The correct answer is C) slash and burn.
The Bantu cleared the land, then fertilized it with ashes. When the land could no longer support their families, the Bantu moved further south. By 1110 B.C., the Bantu had spread their rich culture throughout central and southern Africa. The agricultural technique is described in this passage is slash and burn.
The slash and burn technique in which the land is clear cut and people burn it. The ashes all over the land provide it with nutrients that fertilize the crops. This technique serves two or three years and no more because the land degrades. That is when farmers move to other portions of lands to repeat the process.
